Quick-acting bolt clamp



1,481,553 22 1924 c. v. HANSON QUICK ACTING BOLT CLAMP Filed Oct. 20.1921 Patented Jan. 22, 1924-.

asten rarest orat on CHARLES V. HANSON, OF FALL CITY, VJASHINGTON.

QUICK-ACTING BOLT CLAMP.

Application filed October 20, 1921.

To all whom it may concern.

Be it known that I, CHARLES V. Hanson, a citizen of the United States ofAmerica, and resident of the city of Fall City, in the county of Kingand State of lVashington, have invented certain new and usefulImprovements in Quick-Acting Bolt Clamps, of which the following is aspecification.

My invention relates to quick acting bolt clamps or devices which areintended to be used in connection with a bolt as a quick actin means forsecurin the holdin down 6 f D action of the bolt, thus eliminating thetime consumed in removing and replacing nuts and turning them down.

The object of my invention is to provide a device which may be used incertain situations and under certain conditions to apply and to relievethe holding action of the bolts in a quick and easy manner.

The features of my invention which The lieve to be new will first bedescribed in the specifications and then particularly defined in theclaims.

The accompanying drawings show my invention applied in constructions ofsomewhat varying form adapted for action under the same principle butunder different conditions.

Figure 1 is a side elevation of a bolt having one form of my deviceapplied thereto, showing the same in clamping or holding position.

Figure 2 is a side elevation of the bolt showing the clamping device insection on the plane indicated by the broken line 22 in Figure 1.

Figure 3 is a side elevation of a modified type of construction in whichthe same principle is employed.

Figure 1 is acentral section taken through the holding device shown inFigure 3.

Figure 5 is a device of the same general construction as that shown inFigures 3 and 4, the position being that of Figure 3 except that theclamping member is released or thrown upward.

Figure 6 is a sectional elevation through a clamping device designed foruse in connection with a bolt which extends into and is supported by thesurface against which the clamping is to be done.

Figure 7 shows in perspective the clamping lever constructed as is shownin Figure 6.

Serial No. 509,156.

One of the principal applications of my invention is for the purpose ofholding down covers to containers of various kinds which it may benecessary or desirable to frequently remove, and replace. Another of thepurposes for which the device is especially adapted is for clamping andholding such articles as the yoke-shaped plate which is commonlyemployed as a terminal for electric wires. There are many purposes towhich the device is applicable and I do not desire to limit it to anyparticular use to which it is adapted.

In Figures 1 and 2 the device is shown as applied to a bolt whichprojects upward and is supported from a surface of the body againstwhich it is desired to clamp any object. As shown in these two figuresthe object being held is indicated as the terminal of an electric wire.The particular object being held is, however, immaterial. The bolt 1 isshown as screwed into and sup ported by a base surface or body 10. Forthe purpose of regulating the exact height or projection of the bolt alocknut- 11 is shown by the use of which the bolt may be fixed in anyadjusted position.

The locking member consists of a lever 2 which is provided with twowings or plates 20 separated sufliciently to embrace the stem of thebolt. Upon the bolt beneath the head 12 is placed a collar or. ring 3which is free to turn upon the bolt. The clamping arm or lever 2 ispivoted upon the collar 3 by pivot pins 21. The lower edges 22 of thewings 20 are so shaped as to form cam surfaces. These surfaces are sodisposed that when the lever is down or in holding position as it hasbeen shown in Figure 1, the line of contact between the pivot 21 and thepoint of engagement with the member 1 which is being held down, is nottowards that side of the central or axial plane of the bolt which liestoward the handle 2, but preferably slightly to the other side so thatthere will be no tendency for the lever to be thrown upward or intoreleased position by the pressure applied. The action desired isequivalent to that secured in toggle joint levers which have been thrownso that their central pivot has passed the dead center.

In connection with a device of this sort it is desirable to have aslightly resilient action such that the parts may give a little inthrowing the lever down into locked position and yet so that it willhold securely. In

the construction shown in Figures 1 and 2 this has been secured by theuse of a split or spring washer 5 interposed between the collar 3 andthe head 12.

Figures 3 and a show a modified construe tion. In this the leverconsists of a mem ber 23 which has two arms lying one at each side ofthe bolt, these being connected towards one end by a central band 24.This lever is pivoted at 21 to a nut 80 which is adjustable upon thebolt 1. This lever is provided with a .resilient or spring; extension 25which engages with the object which is to be held. down.

In the type ot construction shown. in Figures 3 and 4; the bolt 1' issupported from some point outside of or above the surface of the body 10against which the clamping is to be done. in this case the resilientextension may be continuous "from side to side and swing under the endof the bolt. In the construction shown in Figure 6 in which the deviceis mounted upon a bolt support-ed from the surface 10 against which theclamping is to be done. the platev 25 which forms this resilientextension must be provided with a. slot as 26, which leaves two sidestrips 27 one at each side of the bolt for engagement with the bodywhich is to be clamped down.

Vith a device of this character the object being held is released bysimply throwing down the clamping lever and secured by throwing up thelever. It thus enables devices which are held down in this manner to bequickly secured and released. \Vhere such device requires a number oiholding down bolts the time saved will amount to considerable.

What I claim as my invention is:

1. A quick acting bolt clamping device comprising a lever having wingspivoted at opposite sides of a bolt and a spring; plate h mine; aU-shaped bend with its ends secured to said lever to form an extensionthereof adapted to form the clamping; surface the arms of said U-shapedmember being: in planes which are substantially parallel with the pivotaxis of the lever and at each side of the axis of the bolt.

2. A quick acting clamping device for bolts con'iprising' a nut threadedupon the bolt, a lever pivoted upon said nut and having a resilientextension adapted to engage the object to be held, said parts beingconnected to hold the extension in alineinent with the bolt when throwninto clamping position.

3. A quick acting bolt clamping device comprising a lever having wingspivoted at opposite sides of the bolt. and a resilient extension fromone end of said lever adapted to engage the object to be held when thelever is alined with the bolt.

Signed at Seattle, King; County, ashington, this 15th day of October,1921.

CHARLES V. HANQON.

